The JBO Thread Ring Gauge (GO) - Metric Fine - Right Hand - 4h - M40 x 2 is a precision tool designed to quickly verify the external thread diameter of components to ensure they meet exact metric fine-thread specifications. It’s an essential aid for machinists, quality-control technicians, and workshop teams who need fast, reliable conformance checks on bolts, fittings, and threaded components.

Crafted from hardened steel for outstanding durability, this GO gauge resists wear in demanding environments and maintains accuracy through repeated use. Its ring design is easy to handle, reduces reading errors, and integrates smoothly into standard inspection routines for consistent, repeatable results.

• Metric Fine GO gauge for M40 x 2 (4h): Enables fast pass/fail checks against the M40 x 2, 4h thread standard, helping you confirm components meet exact specifications with minimal downtime.
• Hardened steel construction: Delivers long tool life and reliable performance in busy workshops, resisting wear to preserve accurate measurements over time.
• Right-hand, standard metric configuration: Designed for the most common right-hand threads, making setup intuitive and reducing inspection time in everyday QC workflows.

Used in quality control and production settings, this gauge helps you verify threads quickly, improve inspection consistency, and reduce rework. Its precise sizing and durable build support dependable results across shifts, boosting confidence in assemblies and the overall reliability of your threaded components.